Merchants traveled at night and camped for rest during the day.,There are a total of 6 steles, 5 of which have been filled with "spiders". A spider has 8 legs, representing 8 years. Each stele is inscribed with 100 spiders, so 5 steles signify 4,000 years.,Not until it was near noon that they packed up and set off, heading towards the mountains to the north.。